main()
{//lekai
    int p,q,r,s,count=0;
    printf("The 4 fractions which sum is equal 1 are:\n");
    for(p=2;p<5;p++)
    for(q=p;q<7;q++)
    for(r=q;r<13;r++)
    if(p*q*r-q*r-p*r-p*q!=0){
        s=(p*q*r)/(p*q*r-q*r-p*r-p*q);
        if(!((p*q*r)%(p*q*r-q*r-p*r-p*q))&&s>=r)
        printf("[%2d]1/%d+1/%d+1/%d+1/%d=1\n",++count,p,q,r,s);
    }
}